I have agonized over a song before and these words of wisdom are very true! I am a beginner or maybe I'm intermediate now. haha :-) Anyway... once, I prayed about a song before I went to bed and believe it or not.... the chord progression came to me in a dream. I know that may seem hard to believe but it's true. I can honestly say, no matter what your level, pray and leave it alone.
I have been playing for about 3 years now and I try not to compare myself to other musicians because that will only hinder my progress. What ever GOD has for me I shall have...no more, no less. It will happen on HIS schedule and not mine. I have tried to make a habit of praying before I practice now because I know that what I do, I do for HIS Glory!
OK...I'll step off my soap box now :-)
God Bless!!!!